Bimetallic strip how to create a thermometer?

Bimetallic thermometer is a kind of field detection instrument suitable for the measurement of low temperature, and it is in our daily life often can see the shadow. So you know how to make a bimetallic strip is a thermometer? Actually we know its manufacture principle, oneself also can DIY.

bimetallic thermometer is the use of bimetallic strip thermal deformation of cold recovery features, note that must choose the material with good linearity, make the precision of the thermometer may be due to the bad linearity is bad. We can use local materials, can use the current meter system. Particular way is as follows:

1, disassemble the ammeter don't remove the magnet, with hair spring coil connection contact with iron separation.

2, selecting suitable length of bimetallic strip, fixed at one end, at the bottom of the dial of the bimetallic strip surface should be parallel to the plane of a hair.

3, will the free end of the balance spring ( Prior to that end of the coil welding together) At the end of the bimetallic strip welding.

4, the said number plate with good scale.

5, the school table: read standard thermometer readings, adjust the balance spring clearance reeds, make the pointer in the vertical position of the dots actual reading, and then heating standard thermometer, tagging readings in turn.

in this process, we learned how to homemade bimetallic thermometer, but if you want to use the thermometer on the device, or need to buy from professional thermometer manufacturers.